May 28, 2008
6871620L01-C
Glossary-6
Glossary
outbound signaling
word
Data transmitted on the control channel from the central controller to the
subscriber unit.
over-molded pad-
array carrier
A Motorola custom IC package, distinguished by the presence of solder
balls on the bottom pads.
over-the-air rekeying
Allows the dispatcher to remotely reprogram the encryption keys in the
radio.
PA
Power amplifier.
paging
One-way communication that alerts the receiver to retrieve a message.
Patriot IC
A dual-core processor that contains an MCU and a DSP in one IC
package.
PC Board
Printed Circuit Board. Also referred to as a PCB.
phase-locked loop
A circuit in which an oscillator is kept in phase with a reference, usually
after passing through a frequency divider.
PL
See private-line tone squelch.
PLL
private-line tone
squelch
A continuous sub-audible tone that is transmitted along with the carrier.
Programmable
Read-Only Memory
A memory chip on which data can be written only once. Once data has
been written onto a PROM, it remains there forever.
PROM
See Programmable Read-Only Memory.
PTT
Push-to-Talk
The switch or button usually located on the left side of the radio which,
when pressed, causes the radio to transmit. When the PTT is released,
the unit returns to receive operation.
radio frequency
The portion of the electromagnetic spectrum between audio sound and
infrared light (approximately 10 kHz to 10 GHz).
radio frequency
power amplifier
Amplifier having one or more active devices to amplify radio signals.
Radio Interface Box
A service aid used to enable communications between a radio and the
programming software.
Radio Service
Software
DOS-based software containing the feature set of an ASTRO radio.
RAM
random access
memory
A type of computer memory that can be accessed randomly; that is, any
byte of memory can be accessed without touching the preceding bytes.
Term
Definition
Summary of Contents for ASTRO XTSTM 4000
Page 1: ...COLOR CHORDS 7 ASTRO XTSTM 4000 Portable Radio Detailed Service Manual ...
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Page 16: ...May 28 2008 6871620L01 C xiv Commercial Warranty Notes ...
Page 22: ...May 28 2008 6871620L01 C 1 6 Introduction Notes ...
Page 26: ...May 28 2008 6871620L01 C 2 4 Radio Power Notes ...
Page 56: ...May 28 2008 6871620L01 C 3 30 Theory of Operation Notes ...
Page 100: ...May 28 2008 6871620L01 C 6 8 Troubleshooting Waveforms Notes ...
Page 194: ...May 28 2008 6871620L01 C B 2 Motorola Service Centers Notes ...
Page 204: ...May 28 2008 6871620L01 C Glossary 10 Glossary Notes ...
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